Birth of A Nation  is a cinematic retelling of American History. Its source is Nat Turner's Confessions of Nat Turner written in 1831 in which 60+ white men, women and infants are slaughtered in an 1831 Virginia slave rebellion and about 150+ slaves are victims of revenge.
Coming during a presidential campaign season and well appreciated by those attending the Sundance Film Festival will . . . well at this point I can't really imagine.
I wonder if Turner's Confessions, which was a transcription of Turner's interviews to his white defense attorney and William Styron's novel, The Confessions of Nat Turner  will even vaguely considered in the discussion of the film. I have read Styron's novel and have assigned Nat Turner's Confessions. As one of the characters in True Detective Season 2 says of journalists "They would rather be first and wrong than be second and right."
Birth of a Nation